The EF 400mm f/2.8L IS III USM offers you the superb image quality of a Canon L series super telephoto in a new, lightweight form that makes it the world's lightest 400mm f/2.8 lens*. A meticulous optical redesign means reduced flare and ghosting thanks to Super Spectra Coating (SSC) and Air Sphere (ASC), a shorter minimum focusing distance and additional comfort and portability. Advanced heat-rejecting paint helps you shoot for longer periods of time even under the hot sun. Operation is made easy with full-time manual AF, while two focus presets to help you quickly dial in the spot you want. Combining sharp image quality with high operability, professionals and advanced photographers can take the EF 400mm f/2.8L IS III USM anywhere in order to capture masterful shots of nature, sports and beyond.

Revised Optics for a Lighter Super Telephoto EF L LensFeaturing carefully refined optics, the EF 400mm f/2.8L IS III USM offers a familiar feel to its predecessor while being even more comfortable to handle thanks to its significantly lighter build. Super UD lens elements offer improved image quality while being more compact in size, while the Image Stabilizer unit has also had its weight reduced. This results in a lens that's more than twenty-five percent, or approx. 2.20 lbs., lighter than its predecessor. Optical placement has also been improved, with the center of gravity now closer to the rear.

Increased Heat Shielding Measures for Reliable, Longer Shooting OutdoorsEven when used outdoors in the heat for extended periods of time, the EF 400mm f/2.8L IS III USM delivers consistent and reliable performance you can trust. A new paint formulation reflects even more heat than before, while a two-layer barrel structure helps reduce the thermal effects on the lens elements. Together, these technologies help maintain image quality and lens reliability even during long shoots under the hot sun.

Dust- and Water-resistant with Fluorine Coatings for Use Even in Harsh ConditionsBuilt to L series lens specifications, the EF 400mm f/2.8L IS III USM features a highly durable design for excellent performance even in inclement weather conditions. It delivers a dust- and water-resistant construction with seals around the mount, switches, rings and more. To help maintain a clean lens, even after multiple lens changes in sub-optimal conditions, the EF 400mm f/2.8L IS III USM has a specially designed fluorine coating on its front and rear surfaces. This fluorine coating helps to prevent water, oil and other surface residue like fingerprints from sticking to the lens, which facilitates quick and easy wiping, without the use of solvents.

Customizable Electronic Focusing RingA customizable electronic manual focusing ring helps ensure you'll get the shot that you want at the right moment. Three sensitivity levels are available to select how quick and precise you want to adjust the focus. This can help whether you need a slow speed to switch between someone's eyes in a distant profile, or a fast speed to dial in on different birds in a large, swiftly moving flock.